Nut-lock.



L. L. SWENSON.

NUT LOCK.

APPLICATION FILED MAR.1'I, 1910.

961,19; Patented June 21,1910.

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whom 1 NUT-LOCK.

Application filedMarch 17, 1910. Serial No. 549,972.

To kill whom it may concern:

Be it known that I, LUTHER L. 'SwnNsoN,

a citizen of the United States, residing at Ottumwa', in the county of \Vapello and State of Iowa, have invented certain new and useful Improvements in Nut-Locks, of which the following is a specification, reference being had to the accompanying drawings.

This invention relates to certain new and useful improvements in nutlocks and has for its object to provide means for securely locking the nut upon the bolt and preventing the same from workingoff of the end of the bolt.

A-furthei' object of the invention is to improve the construction and greatly simdevices of this character and also to produce a nut lock which may be manufam tured at a very low cost. and one which is efficient" and highly durable in use.

. With these and other objects in view, the

invention consists of the novel construction,

inbinatiou, and arrangement of parts,

hereinafter fully described and claimed, and

illustrated in the accompanying drawings,

in which Figure 1 is a perspective view illustrating one application of my invention showing the same applied to a rail joint; Fig. 2 is a vertical longitudinal section through a bolt having a nut loci; thereon; Fig. 3 is a section taken on the line 3-3 of Fig. 2.; Fig. 4 is a detail perspective view of the bolt; and Fig.

, 5 is a detail perspective view of the locking spring.

, Referring more-particularly to the drawings, 5 indicates a bolt provided with the usual threads to receive a nut 6. This bolt is provided upon opposite sides with shallow D from its outer to its inner end as longitudinal grooves 7. These grooves would preferably be cut the depth of the bolt threads and extend from the out-er end of the bolt to the head thereof. The bore of the nut 6 is of course likewise threaded for engagement with the threads on the bolt and a longitudinally extending recess 8, is formed therein and communicates with the bore. This recess gradually increases in depth clearly shown. in Fig. 2 of the drawings and is adapted to receive a locking spring 9. This spring is in the form of a strip of resilient metal bent to describe a compound curve. The inner curved end of the spring is positioned in the deepest portion of the recess 8,

Specification of Letters Patent.

having a nut engaged thereon,

Patented June 21, I

of the nut and the tension of saidlspr-ing, will, obviate the possibility f i i ward movement owing to the gijaduallyda creasing space between the base of;;th ,l on'gitudinally extending groove 7 andgth basepf the recess 8. in the groove of the turning movement of the nut fthereon and when in position the outer protruding end of the spring may be bent upwardly upon-the face of the nut whereby a secure;and eflicient, lock is provided without detracting from the" appearance ofthe device or -.the object in which. the bolt is positioned. By providing agroove in each side of the bolt, the nut'inay be securely locked by a half turn thereon so that it may be brought into secure clamping engagement with the face of the fish plate of the rail or other object. I

From the above it will be seen that I have provided a very eflicient nut lock which is of such construction that it will permit of the removal of the nut from the bolt without destroying the same, the locking spring being capable of ready withdrawal from the groove of the bolt. .lhe nut may be very -quickly locked ufpon the bolt withoutnecessitating the use tools as the spring 18 easily inserted into the groove of the bolt between the same and the recess in the nut. It will be obvious, that if desired, the spring instead of being in the form of a flat strip may be constrticted of resilient wire of a good quality of steel,'and that by the employment of this locking spring, the expense of production is reduced to a minimum, the spring being capable of manufacture in large nuinbers at a very slight expense. The grooves and recesses in the bolts and nuts may be rovided as they are manufactured with very little additional expense. The nut lock is also very strong and durable and is applicable to a great many purposes other than that disclosed in the drawings.

It will be understood that the device may be variously modified so as to render the same applicable to other uses without materially departing from the essential features or sacrificing any of the advantages of the invention.

What is claimed is:

1. A nut lock comprising a threaded bolt said bolt being provided with opposite longitudinally extending grooves in its periphery, said nuthaving a longitudinal recess therein gradit ea al .dii-

The positioning of tl ss ngy bolt w nr reatany" i the outer end of said spring being bent upon ually increasing in depth from its outer to its inner end and adapted to be dispose- 1 in alinement with one of the grooves of the bolt, and a locking spring tormed from a strip of resilient sheet metal, said sheet metal stripbeingbent in the form of a compound curve between its ends, one end of said spring being engaged with the base of the groove in the bolt inwardly of the nut, one of the curves of said spring bearing upon the base of the recess in the nut, said spring adjacent to its outer end again engaging in the groove of the bolt thereby havingtwo separate points of contact with the base of said groove, the gradually increasing depth of the recess in the nut which is engaged oy said spring preventing the accidental outward movement of the spring,

the face of the nut.

2. A nut lock comprising a threaded bolt having a nut en aged thereon, said bolt being provided with opposite longitudinally extending grooves in its periphery of substantially the same depth asthe threads thereon, said nut having a longitudinal recess therein gradually increasing in depth from its outer to its inner end and adapted to be disposed in alinement with one of the grooves of the bolt, a locking spring insertible into the groove and recess of the bolt and nut and yieldingly engaging with the walls thereof to hold the nut against rotation, said spring being bent to form a compound curve, the gradually increasing depth of the recess in the nut preventing the outward movement of the spring, said spring having its outer end bent upon the face of the nut.

In testimony whereof I hereunto affix my signature in the presence of two witnesses.

Witnesses:

' AXEL ELMBORG,

Jmrns GEE. 

